11 files changed, 32 insertions, 71 deletions

diff --git a/arch/c6x/Kconfig b/arch/c6x/Kconfig
index aee1b569ee6e..66eab3703c75 100644
--- a/arch/c6x/Kconfig
+++ b/arch/c6x/Kconfig
@@ -18,6 +18,7 @@ config C6X
         select OF_EARLY_FLATTREE
         select GENERIC_CLOCKEVENTS
         select GENERIC_KERNEL_THREAD
+        select GENERIC_KERNEL_EXECVE
         select MODULES_USE_ELF_RELA
 
 config MMU
diff --git a/arch/c6x/Makefile b/arch/c6x/Makefile
index a9eb9597e03c..e72eb3417239 100644
--- a/arch/c6x/Makefile
+++ b/arch/c6x/Makefile
@@ -41,7 +41,7 @@ DTB:=$(subst dtbImage.,,$(filter dtbImage.%, $(MAKECMDGOALS)))
 export DTB
 
 ifneq ($(DTB),)
-core-y  += $(boot)/
+core-y  += $(boot)/dts/
 endif
 
 # With make 3.82 we cannot mix normal and wildcard targets
diff --git a/arch/c6x/boot/Makefile b/arch/c6x/boot/Makefile
index 6891257d514c..8734abee548e 100644
--- a/arch/c6x/boot/Makefile
+++ b/arch/c6x/boot/Makefile
@@ -6,25 +6,5 @@ OBJCOPYFLAGS_vmlinux.bin := -O binary
 $(obj)/vmlinux.bin: vmlinux FORCE
         $(call if_changed,objcopy)
 
-DTC_FLAGS ?= -p 1024
-
-ifneq ($(DTB),)
-obj-y += linked_dtb.o
-endif
-
-$(obj)/%.dtb: $(src)/dts/%.dts FORCE
-        $(call if_changed_dep,dtc)
-
-quiet_cmd_cp = CP      $< $@$2
-        cmd_cp = cat $< >$@$2 || (rm -f $@ && echo false)
-
-# Generate builtin.dtb from $(DTB).dtb
-$(obj)/builtin.dtb: $(obj)/$(DTB).dtb
-        $(call if_changed,cp)
-
-$(obj)/linked_dtb.o: $(obj)/builtin.dtb
-
 $(obj)/dtbImage.%: vmlinux
         $(call if_changed,objcopy)
-
-clean-files := $(obj)/*.dtb
diff --git a/arch/c6x/boot/dts/Makefile b/arch/c6x/boot/dts/Makefile
new file mode 100644
index 000000000000..c7528b02d061
--- /dev/null
+++ b/arch/c6x/boot/dts/Makefile
@@ -0,0 +1,20 @@
+#
+# Makefile for device trees
+#
+
+DTC_FLAGS ?= -p 1024
+
+ifneq ($(DTB),)
+obj-y += linked_dtb.o
+endif
+
+quiet_cmd_cp = CP      $< $@$2
+        cmd_cp = cat $< >$@$2 || (rm -f $@ && echo false)
+
+# Generate builtin.dtb from $(DTB).dtb
+$(obj)/builtin.dtb: $(obj)/$(DTB).dtb
+        $(call if_changed,cp)
+
+$(obj)/linked_dtb.o: $(obj)/builtin.dtb
+
+clean-files := *.dtb
diff --git a/arch/c6x/boot/dts/linked_dtb.S b/arch/c6x/boot/dts/linked_dtb.S
new file mode 100644
index 000000000000..cf347f1d16ce
--- /dev/null
+++ b/arch/c6x/boot/dts/linked_dtb.S
@@ -0,0 +1,2 @@
+.section __fdt_blob,"a"
+.incbin "arch/c6x/boot/dts/builtin.dtb"
diff --git a/arch/c6x/boot/linked_dtb.S b/arch/c6x/boot/linked_dtb.S
deleted file mode 100644
index 57a4454eaec3..000000000000
--- a/arch/c6x/boot/linked_dtb.S
+++ /dev/null
@@ -1,2 +0,0 @@
-.section __fdt_blob,"a"
-.incbin "arch/c6x/boot/builtin.dtb"
diff --git a/arch/c6x/include/asm/Kbuild b/arch/c6x/include/asm/Kbuild
index 112a496d8355..eae7b5963e86 100644
--- a/arch/c6x/include/asm/Kbuild
+++ b/arch/c6x/include/asm/Kbuild
@@ -49,6 +49,7 @@ generic-y += termbits.h
 generic-y += termios.h
 generic-y += tlbflush.h
 generic-y += topology.h
+generic-y += trace_clock.h
 generic-y += types.h
 generic-y += ucontext.h
 generic-y += user.h
diff --git a/arch/c6x/include/asm/syscalls.h b/arch/c6x/include/asm/syscalls.h
index e7b8991dc07c..df3d05feb153 100644
--- a/arch/c6x/include/asm/syscalls.h
+++ b/arch/c6x/include/asm/syscalls.h
@@ -41,10 +41,6 @@ extern long sys_fallocate_c6x(int fd, int mode,
                               u32 len_lo, u32 len_hi);
 extern int sys_cache_sync(unsigned long s, unsigned long e);
 
-struct pt_regs;
-
-extern asmlinkage long sys_c6x_clone(struct pt_regs *regs);
-
 #include <asm-generic/syscalls.h>
 
 #endif /* __ASM_C6X_SYSCALLS_H */
diff --git a/arch/c6x/include/uapi/asm/unistd.h b/arch/c6x/include/uapi/asm/unistd.h
index 4ff747d12dad..f3987a8703d9 100644
--- a/arch/c6x/include/uapi/asm/unistd.h
+++ b/arch/c6x/include/uapi/asm/unistd.h
@@ -14,8 +14,8 @@
  *   more details.
  */
 
-#define __ARCH_WANT_KERNEL_EXECVE
 #define __ARCH_WANT_SYS_EXECVE
+#define __ARCH_WANT_SYS_CLONE
 
 /* Use the standard ABI for syscalls. */
 #include <asm-generic/unistd.h>
diff --git a/arch/c6x/kernel/entry.S b/arch/c6x/kernel/entry.S
index 0ed6157dd256..5239057de4c4 100644
--- a/arch/c6x/kernel/entry.S
+++ b/arch/c6x/kernel/entry.S
@@ -415,19 +415,9 @@ ENTRY(ret_from_kernel_thread)
 0:
         B       .S2     B10                /* call fn */
         LDW     .D2T1   *+SP(REGS_A1+8),A4 /* get arg */
-        MVKL    .S2     sys_exit,B11
-        MVKH    .S2     sys_exit,B11
-        ADDKPC  .S2     0f,B3,1
-0:
-        BNOP    .S2     B11,5   /* jump to sys_exit */
+        ADDKPC  .S2     ret_from_fork_2,B3,3
 ENDPROC(ret_from_kernel_thread)
 
-ENTRY(ret_from_kernel_execve)
-        GET_THREAD_INFO A12
-        BNOP    .S2     syscall_exit,4
-        ADD     .D2X    A4,-8,SP
-ENDPROC(ret_from_kernel_execve)
-
         ;;
         ;; These are the interrupt handlers, responsible for calling c6x_do_IRQ()
         ;;
@@ -624,18 +614,6 @@ ENDPROC(sys_sigaltstack)
         ;; Special system calls
         ;; return address is in B3
         ;;
-ENTRY(sys_clone)
-        ADD     .D1X    SP,8,A4
-#ifdef CONFIG_C6X_BIG_KERNEL
- ||     MVKL    .S1     sys_c6x_clone,A0
-        MVKH    .S1     sys_c6x_clone,A0
-        BNOP    .S2X    A0,5
-#else
- ||     B       .S2     sys_c6x_clone
-        NOP     5
-#endif
-ENDPROC(sys_clone)
-
 ENTRY(sys_rt_sigreturn)
         ADD     .D1X    SP,8,A4
 #ifdef CONFIG_C6X_BIG_KERNEL
diff --git a/arch/c6x/kernel/process.c b/arch/c6x/kernel/process.c
index 2770d9a9a84e..6434df476f77 100644
--- a/arch/c6x/kernel/process.c
+++ b/arch/c6x/kernel/process.c
@@ -112,22 +112,6 @@ void exit_thread(void)
 {
 }
 
-SYSCALL_DEFINE1(c6x_clone, struct pt_regs *, regs)
-{
-        unsigned long clone_flags;
-        unsigned long newsp;
-
-        /* syscall puts clone_flags in A4 and usp in B4 */
-        clone_flags = regs->orig_a4;
-        if (regs->b4)
-                newsp = regs->b4;
-        else
-                newsp = regs->sp;
-
-        return do_fork(clone_flags, newsp, regs, 0, (int __user *)regs->a6,
-                       (int __user *)regs->b6);
-}
-
 /*
  * Do necessary setup to start up a newly executed thread.
  */
@@ -155,13 +139,13 @@ void start_thread(struct pt_regs *regs, unsigned int pc, unsigned long usp)
  */
 int copy_thread(unsigned long clone_flags, unsigned long usp,
                 unsigned long ustk_size,
-                struct task_struct *p, struct pt_regs *regs)
+                struct task_struct *p)
 {
         struct pt_regs *childregs;
 
         childregs = task_pt_regs(p);
 
-        if (!regs) {
+        if (unlikely(p->flags & PF_KTHREAD)) {
                 /* case of  __kernel_thread: we return to supervisor space */
                 memset(childregs, 0, sizeof(struct pt_regs));
                 childregs->sp = (unsigned long)(childregs + 1);
@@ -170,8 +154,9 @@ int copy_thread(unsigned long clone_flags, unsigned long usp,
                 childregs->a1 = ustk_size;      /* argument */
         } else {
                 /* Otherwise use the given stack */
-                *childregs = *regs;
-                childregs->sp = usp;
+                *childregs = *current_pt_regs();
+                if (usp)
+                        childregs->sp = usp;
                 p->thread.pc = (unsigned long) ret_from_fork;
         }